Drop-hammer.



PATENTED JULY 14, 1908.

A. A. AMBLER.

DROP HAMMER. PPLIGATION FILED Now/128.1904.

5 SHEETS-SHEET 1.

@qu [Manca PATEN'I'ED JULY14, 1908.

A. A. AMBIER.

DROP HAMMER.

PPLIOATION FILED Nov.2s.19o4.

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PATENTED JULY 14, 190,8.

No. 893,561. y

A. A. AMBLER. DROP HAMMER. APPLICATION FILED NOV. 28.1904.

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I attoznu Witwen@ No, 893,561'. 'PATEN TTTT ULY 14, 190g.

. AAAAA R.

DROP HAMMER. IIIIIIIIIIIIII BD,Nov.2a,19o4.

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PATENTED JULY 14, 1908.

A. A. AMBLBR. DRDP HAMMER. APPLICATION FILED Nov .2a,19o4.

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attorney,

ARTHUR A. AMBLER, F SFRNGFIF'LD, OHI.

cll whom 'it may concern.'

" Be it known that I, ARTHUR A. AMBLER, a

citi'zen of the United States, residing at ringfield, in the county of Clark and State of-Ohio, have` invented certain new and useful' Improvements in Drop-Hammers, of

the' following is a specification, refer fence' beinghad therein to the accompanying T-his invention relates to drop hammers f and has for its object lto provide a structure of this character which shall'be strong and durable in construction and of superior eiliciency in oper'ation.

4More specifically, my present invention relates t0 certain improvements in the construction of the frame, whereby greater Astrength and durability are obtained in the connection of the Ways to the base and to the head; to certain'improvements in the Inode of mounting and guiding the drop rod; to an improved buer for the drop rod, which shall have increased durability, shall be less noisy in operation and which may be more readily adjusted upon the drop rod; to an improved construction andvarrangement of the spring which controls the latch and tri ping arm of the automatic trip; and to t e provision of means for preventing the lubrieating-oil from having access to the lifting rolls and thereby aiiecting their grip.

To these ends myinvention consists in certain novel features which I will now proceed to describe, and'will then particularly point out in the claims. -In the accompanying drawings, Figure 1 is a front elevation of a drop hammer embodyin my invention in one form; Fig. 2 is a side e evation of the same; Fig. 3 is an enlarged detail sectional view, taken on the line :t: of Fig. 2 through the lower portion of one of the ways or upriglits and the adjacentpart of the base, looking in the direction of the arrows; Fig. 4 is a detail sectional view, taken on the line y 'y of Fig. 3 and looking in the direction 'of the arrows; Fig. 5 is a similar View, taken on the line z e .of Fig; 3 and looking in the same direction;

Fig. 6 is a detail vertical section through the head and the upper ends of the Ways oru if rights; Fig. 7 is a lan section, taken on t ie line u fu. of Fig. 1.; ig. S is a detail plan sec *tion of onesidc of the structure, taken on the line 'v o of Fig.I 1; Fi 9 is asimilar view,

taken on the line ww o Fig. 1; Fig. 1;@ is a detail elevation ofthe drop rod,l its supports ASpecicatimn oi :Lettere Patent. Application flledlNovember 2&3, lt. cris?. No. ttlli.

'the upright.

' Patented uly and a portion oits connections, detached; Fig. 11 is asimilar view of the automatic trip mechanism; Fig. 12 isa top plan view of the u per bearing ofthe vtrip rock shaft, detache; Fig. 13 is a similar view of the tension 'plate cooperating therewith; Fig. 14k is a sideelevation oi. the saine; Fig. 15 is a detail elevation, partly in section, of one oi' the rolls; Fig. 16 is a sectional view oi the is. reos.

same, taken on the line t tot Fig. 15 and loolring in the direction of the arrows; Fig. 17 is' a detail view of the bumner, in elevation, showing the same attache to the dro rod; Fig. 18 is a plan view of the same; an Figs.

19 and 20 are detail views of the upperend' of the drop rod and its guide.

Referrin vention which relate to the construction or the frame of the machine, said frame consists7 as usual, of a baseor anvil. 1, uprights, side members or ways 2, and a head 3. The base is provided on'each side with the usual upward extension e, which forms a'support for the corresponding upright, and is grooved or recessed, asindicated at 5, for about nnehalf of its width, to receive the corres onding interlocking projections 6 on the ower end of the u right 2. Through the remaining portion o' the sup ort 4 there extends an adjusting screw 7, W ich passes through a nut 8, set in a suitable recess in the support,

and bears against the vertical face of the projection 6 on the lower end ci the upright for thek urpose oi adjusting the same. The usualD c mectin bolts 9 pass through the parts to secure t em together. So far as the construction has been just described, it is one usually employed. Since the groove 5 and engaging projection 6 extend only part way across the meeting surfaces of the up right and base, the outer Aportion of the lowerA end of the u right is, in said usual construe tion, left wit out any support against transverse strains. To overcome this defect, i provide on the upper part of that portion of the support 4 which lies outward beyond the recess 5, and through which the adjusting screw 7 passes, an upward `projection 10, which rits a corresponding recess 11 in the under face of the correspondany portion ol By reason of this construe-- tion, the upright is supported against vtremaverse strains atits lower end acressits entire lower face through the interlocking oi the respective projections and recess-eeen the base 'fand upright.

iirst to those features of my in- M j 2 see-,561

The upper ends of the uprights terminate, in

- flat horizontal bearing surfaces 12, on which the under surface ofthe head 3 rests directly at each side. The faces of the u per ends of 'the upright lying opposite each, other are downwardly and 'outwardly inclined, as indicated at 13, and the head has a downward extension14, which fits between the upper ends'of the uprights and has its outer faces similarly inclined. Bolts 15 pass through these overla ping portions of the head and uprights, and areprovided on their projecting ends with nuts' 16 and yielding washers 17, of leather or the like, interposed between said nuts and the o uter faces of the uprights. When the hammer is in use, the maximum strain between the head and uprights is'one which tends to separate them-iu avertical direction, and itl has heretofore been sought to resist Athis strain by interlocking projections between' the head and uprights, presentino two4 or more opposing surfaces meeting in lhorizontal planes and resisting separation of the parts in either direction. In practice, it-has been found that this eventually leads to the fractureof the interlocking p arts. This difficulty is overcome by the 'construction which I have devised, in which there is only one horizontal meeting plane of the parts, which does not tend to prevent separation thereof, said separation being-resisted by the diverging meeting surfaces of the head and uprights, and the bolts which 'prevent lateral separation thereof. The yielding washers permit sufficient play of the parts to prevent any fracture thereof, while the construction is such that'the frame members at the to ol the machine are held together with a Ermness'sufcient to meet the re uirements of the structure.

eferring nex't to the constructie-r1 of the drop rod, the lower portion or body iiiereof, indicated by the reference numeralplaa, is of the usual circular cross section, and moves through an aperture 19 of similar section in a guidin r arm 20 near its lower end. The upperen or head 21 of the drop rod is, however, approximately square in cross section, being provided on each side with a groove 22, as shown more particularly in Fig. 19, and rec'iprocates in a 'guide 23 which receives the rear portion of the head 21 and has a .T-

shaped slot 24, as shown in Fig. 20, to receive said rear portion of said head.

On the front of the 'head there is provided a lug 25, to which is pivotcd the lower end of a connecting rod 26, the up )er end of which is pivoted to lan arm 27 which controls thel eccentrics 28 which shift the movable roll toward and from its companion roll. By reason of this construction, the drop rod is entirely free from the lateral strains to which it is subjected when its upper end is directly connected to the eccentricarm, and it is therefore free to move vertically in its guides with -in ,any desired position thereon.

a minimum of friction; The construction of the head' 21 of the drop'rod and its guide are such as to prevent any twisting or'turnin of the rod around its longitudinal axis, an at the same time to provlde a suitable bearing to meet the strains caused by the connectionv of the connecting rod 26 to the lug at one side ing therewith to recelve a key or spline 32,-

havin .a retaining head 33 which rests --on top o the bod 29. Set screws 34 ass through the en of the body 29 and ear against the key 32, so as to force the same against the drop rod and clamp the bumper The drop rod has the face thereof against which the key 32 bears flattened, as indicated at 35, so that when the set screws are loosened to permit adjustment of the bumper, said bumper is prevented from rotating around the rod and thus becoming displaced relatively to the portion ofthe hammer which is to contact 'with it.

The bumper proper comprises a steel contact plate 36, and a rubber cushion 37 interpose( between said plate and the under side of the body 29. A screw bolt 38 passes througlrth'e plate 36, in which its head is countersu'nk, and thence loosely upward through the rubber cushion 37 and bodv 29, l

above which body it extends'sufficiently to receive a coiled sprin 39.' Said spring bears on top of the bo( y 29 and against a washer 40 onthe bolt 38, said Washer being held in'position by an adjusting nut41 and lock nut 42. The s ring 39 serves to always hold the contact p ate against the rubber cushion, taking up the slack of said plate and f of the bolt 38 when the cushion is compressed by the shock of contact, and thereby preventing looseness and rattling of the parts, with the consequent noise and wear.

The automatic trip mechanism' com rises a vertical rockshaft 43, mountedv at its ower end in a suitable bearing in the arm 2 0 and at its upper'end in a suitable bearing in an arm 44, 'which has an aperture 45 to receive said rock shaft. This rock shaft carries the usual latch 46 to engage a notch' or shoulder,47 of the drop rod to hold the same in lifted posi tion, and a tri arm 48, with which coperates an inclinled)surface 49 on the hammer 50.

These parts may be of any approved construction, such as that shown. The rock shaft is s ring-actuated to cause the latch to engage tie drop rod when not prevented from doing so by the cooperating portion of the hammer, and it isl to the construction and arrangement of this spring that the feature, of my invention now under consideration particularly relates. The rock shaft 43-is mounted thereon ses 561 i extended above the bearing 44 tor a distance sufficient to receive thereon a sprin 51, coiled around the upward extension o said rock shaft and secured thereto atits upper end. The lower end of the spring 51 is secured toa pin 52, which projects upward from a tenslon plate 53 supported on the bearing 44, through which tension plate the rock shaft passes loosely .through a central aperture 54. The .plate 53 and bearing 44 are connected by a bolt 55 which prevents rotation ofthe tension plate, and provision is made for the adjustment of the tension and of the spring by forming a plurality of apertures 56 through the tension plate to receive the bolt. The bearing 44 has a plurality of apertures 57 also formed therethrough to receive the bolt 55, said apertures being separated from each other by a distance less than the distance se arating the apertures 56. It is extremely esirable that the tension oi thc spring 51 shall be the minimum required to properly engage the latch with the drop rod, and by reason of the construction whic I have just described the said tension can be adjusted with great nicety, the tension plate bein provided with any suitable means forv readily rotating it, as, for instance, radial apertures 58 to receive a pin `for thatv purpose. If the desired tension requires a move ment of the tension plate less than through the angular distance separating two of the apertures 56, then', by reason of the difierentially placed apertures 57, the tension plate may be readily moved into position sufficiently near the desired osition to be practically correct and at tllie same time ring some one of the apertures 56 into ragistry with some one of the apertures 57 whereupon the bolt 55 may be placed through said'registering apertures to hold the tension plate in its adjusted osition.

In practice, it is not infr'e uent ythe'case that the lubricant employe inconnection with the bearings of the ripping rolls escapes from those bearings anflows along the roll shaftto the roll, Where it spreads over thev surface of the same and 'diminishes the erhciency of its gri ping action; To overcome this difficulty, I ave devised a construction shown in detail in Figs. 15 and 16, in which 59 indicates the"roll sliait,l and 60 the roll b means 'oi a hub or collar 61 at each end. [I on thishub or collar is fixed a 'sheet metal isk 62., the inner margin 63 of which is' flanged out to-it .the hub,

while the bodyof the disk is radial, or in a plane at right angles to the axis of rotation of the disk. The outer margin of the disk is bento'ver to form a hollow or open bead 64, which serves to retain within its recess an absorbent body 65 of any suitable ibrous material. This ldisk -serves to l intercept the oil to prevent its having access to the face ofthe rol such intercepted oil being retained by the absorbent material, which may be readily removed and replaced from time to time, as may be requirer I do not wish .tobe understood as limiting myself to the precise details of 'constructionl hereinbefore described and shown in the aci companying drawings, as it is obvious that the same may be varied without departing from the principle'of my invention.

Having thus fully described my invention, what I claim as new and desire to'secure by Letters Patent is i 1. In a drop hammer, a guide for the upper slot, in combination with a drop rod having a head rectangular in cross section and provided with lateral grooves, whereby the guide embraces and'fits its rear portionfsaid head having a pivot lug formed on the part thereotl which lies outside of the guide, and a conf vend of the drop rod provided with aTshaped passing through said plate, cushion and body,

extending above the latter, an abutment mounted on the upper end of -said screw, and Aa spiral spring mounted on said screw and bearing a ainst said abutment and body,'

substantia 1y as described.

3. In a dro i hammer., a dro rod bum er comprising a lliody, a contact p ate, a rub er cushlon interposed between said plate and body, a screw bolt engaging said plate and passing through said plate, cushion and body, extending above the latter,. an abutment mounted on the upper end of said screw, and a spiral spring mounted on said screw and bearing against said abutment and body, said abutment comprising a bearing plate or washer, and adjusting and lock nuts mounted on the threaded. portion ofthe screw bolt, substantially as described.

4. In al drop hammer, a rock shaft provided with a latch to engage' the dro rod and with a trip arm tobe engaged by the Iiammer, a bearing for said rock shaft, a tension plate loosely mounted on said rock shaft adjacent to the bearing, a sprinO-connected to the rock shaft at one end, coiled around said shaft, and connected at its other end to the tension plate, whereby rotation of said plate adjusts thetension of the spring, and means for securing said plate to sald bearing to prevent rotation thereof after adjustment, substantially as described.` j i" Y 5. In a drop hammer, a rock shaft pro vided with a latch to engage the dro ro'd and with a trip arm to beengaged by the iammer,

beari'n 1 Oisaid rock shaft,'a tension plate y mounte loosely on said rock shaft adjacent to said bearing, a spring connected to the n rock shaft at one of its ends, coiled around v vided with a plurality of adjusting apertures,

said bearing being provided With a coperating aperture with Which the apertures of the plate may be caused to register, and a bolt or pin adapted to pass through the registeringapertures to prevent rotation of the tension plate, substantially as described.

6. In a drop hammer, a rock vshaft provided with a latch to engage the drop rod and with a trip arm to be engaged by the haminer, a bearing for said rook shaft, a tension plate mounted loosely on said rock shaft adjacent to said bearing, a springl connected at one of its ends to the rook shaft, coiled around said shaft, and connected at itaother end to the tension late, said tension plate being provided with) a plurality of equally spaced adjusting apertures therethrough, said bearing having a plurality' of4 apertures differentially spaced relatively to those'of the plate, and a bolt or pin adapted to pass through the apertures of the plate and bearing, substantially as described. 4

In testimony whereof, I anx my signature in presence of two Witnesses.

ARTHUR A. AllBLER. Witnesses:

- J. J. WELTY, l

IRVINE MILLER. 

